Just cut to size and slip a piece of white (or other corresponding color) paper, tag board or plastic in there before you fill it. Then when your recipient uses what's inside, they can take the lining out to display the jars empty if they want. That'...
No, You can't use just any jar to can with. The typical screw bands and lids are specifically made to seal and therefore protect and preserve your foods. The canning jars are also made to withstand high temperatures without cracking or breaking. You ...
If the jars are hot and the water cold, or vice versa, that will cause them to break. Also, if they have any hairline cracks to begin with, that will also cause it. Inspect the jars for cracks before filling them, and then I heat mine in the dishwash...